Pad roller arm



June 17, 1930. A} DINA PAD ROLLER ARM Filed April 18,1928

IN V EN TOR.

BY i 5 5 I} ATTORNEY Patented June 17, ,1930

UNITED STATES PATENTE OFFICE I AUGUSTO DINA, OF JERSEY CITY, NEW JERSEY,ASSIGNOR TO INTERNATIONAL PRO- J'EGTOR CORPORATION, OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE ran some]; ARM

Application filed April- 18, 1928. Serial 110. 271,091.

This invention relates to a projection head, and more particularly to apadroller arm forming a part of the projection head and adapted to bearagainst the film sprocket for holding the film in engagement therewith.

is contained wlthin the arm itself and is so designed that the arm maybe readily moved from one position to the other by applying a suitableforce thereto, but will be securely held in either position when theforce is withis drawn.

The arm constructed in accordance with this invention employs the stopmember orstud having a dual function, namely, to limit the movement ofthe arm and to contact with a friction pin for holding the same in itsextreme positions. The invention, therefore,

- eliminates external holding means and leaves a a free space for theinsertion and operation of the film. -.The invention also consists incertain new and original features of construction and combinations ofand claimed.

Although the novel features which are be:

parts hereinafter set forth lieved to be characteristic of thisinvention will be particularly pointed out in the claims appendedhereto, the invention itself, as to its objects and advantages, the modeof its operation and the manner of itsorganization may be betterunderstood by referring to the following description taken in connectionwith the accompanying drawings forming a partthereof, in which Fig. 1 isan elevation of a projection head showing the location of the pad rollerarm as applied thereto;

' Fig. 2 is a plan view ofthepad and supporting means; I

, Fig. 3 is a side elevation thereof showing the arm in film engagingposition;

Fig. 4 is an end elevation of the arm and associated mechanism; and

Fig. 5 is a side elevation showing the arm in film releasing position.

roller arm.

Like reference characters denote like parts in the several figures ofthe drawings.

In the following description and in the claims parts will be identifiedby specific names for convenience, but they are intended to be asgeneric in their application to similar parts as the art will permit.

Referring to the drawings more in detail, Fig. 1 shows diagrammaticallythe upper film magazine 10 and lower film magazine 11 with theprojection head 12, of an -well known form, associated therewith. heparticular formation of film magazines and projection head form no partof the present invention except in so far as the pad roller arm isassociated therewith.

Considering so much of the mechanism of the projection head as isnecessary to an understanding of the present invention, an uppercontinuous film sprocket 13 is provided for withdrawing film 14 fromupper film magazine 10. The film is then passed over intermittentsprocket 16 and then passes to lower film magazine 11 over continuoussprocket 17 The pad roller arm about to be.

described has been shown as associated with upper continuous sprocket13, although it is obvious that it may be employed with any of the filmsprockets if desired.

Referring to Figs. 2 and 5, the pad roller arm 18 is formedsubstantially L-shaped having a roller supporting section 20 and abifurcated section 21 with a pivotal bearing member 22 locatedtherebetween. Bearing member 22 is adapted to be journalled onsupporting stud 24, resting against stationary collar 25, supportedthereby. Stud 24 may be secured in a vertical plate 26 forming a part ofthe projection head in any desired manner.

Arm 20 extending from hearing 22 is provided at its end with a tubularsection 27 into which roller supporting 'rod 28 is inserted and securedby means of set screw 29; Rod 28 is formed with a reduced section 30providing a bearing for roller 31" and with an outwardly extendingenlarged section 32 which forms a handle for moving the arm from oneoperative sition to the other as will be hereafter set orth. Roller 31is suitabl shaped to contact with film sprocket 13 an is free to berotated thereby or by the film passing. thereover.

Section 21 of roller arm 18 is bifurcated to form a pair of members 35and 36 which are positioned on opposite sides of stop member or stud 37.Stud 37 is secured to vertical plate 26 of the projection head in anydesired manner. Member 36- is adapted to bear against stop member 37 forlimiting the movement of the arm in one direction and adjustable setscrew 38 is threaded in member 35 and serves to limit the movement ofthe arm in the other direction. Lock nut 39 may be associated with setscrew 38 for securing the same in any desiredposition.

Friction pin 40 having a rounded end 41 is inserted in a tubular bore inarm 21 and pressed outwardl by means of spring 42 which is inserted inthe lower portion of said bore. Pin 40 is provided with a slot 43extendin over a portion of the length thereof which is adapted toengagescrew 44 for preventing withdrawal of said pin. Screw 44 u may bethreaded into the face of arm 21 after pin 40 has been inserted, andwill thereafter prevent accidental removal of said pin.

Pin 40 is so positioned with respect to stop member 37 that when the armis in film engaging position as shown in Fig. 3, said pin will contactwith the side of said stop member and by the frictionthereof will serveto hold the arm in the selected position. When in film releasingposition as shown in Fig. 5, pin 40 contacts with the opposite face ofstop member 37 for holding the arm in that osition. Furthermore, thearrangement the 'parts is such that the force of spring 42 is utilizedfor urging arm toward either of its extreme posltions.

In using the above described mechanism,

. in order to insert a film in the projection head,

pad roller arm 18 is moved downwardly by pressin handle 32 intodisengaging position. e film is then passed over film sprocket 13 andthe roller arm again raised by means of handle 32. It is then pressedagainst the face of the film sprocket and prevents the film frombecoming disengaged therefrom. Set screw 38 is preferably so adjustedthat roller 31 is prevented from exerting a force on sprocket 13 inexcess of that required for holding the film in position.

The various adjusting locln'ng means of the pad roller arm are formed ina self contained unit whereby free space is left for the insertion ofthe film. Pin is secured interiorly of bifurcated section 21 ontherolIer arm, and by reason of locking screw 44 permits the arm to beremoved as a unit for purposes of replacement or adjustment. A singlestop member is employed on the projection head for limiting the movementof arm 18 and also for cooperating with pin 40 for securing the arm inits extreme positions.

Although the above described pad roller arm has been shown as applied tothe upper continuous film sprocket, it is obvious that it may be used inother locations where a roller arm is required without departing fromthe scope of the present invention.

While certain novel features of the invention have been shown anddescribed and are pointed out in the annexed claims, it will beunderstood that various omissions, substitutions and changes in theforms and details of the device illustrated and in its operation may bemade by those skilled in the art without departing from the spirit ofthe invention.

What 1s claimed is:

1. A pad roller arm comprising an L- shaped member, one end of saidmember being bifurcated to provide stop members and the other endthereof being drilled to receive a roller supporting arm, and meansassociated with said bifurcated end for securing said arm in eitherextreme sition.

2. In combination with a projection head having a film sprocket, a padroller, means for supporting said roller in variable relation withrespect to said sprocket comprising a pivoted arm, a roller supportsecured to one end of said arm, stop members associated with the otherend of said arm, a spring pressed friction pin carried by said armbetween said stop members and a stud secured to said projection head andcontactingv with said stop members and said pin whereby the movement ofsaid arm is limited and said arm is frictionally secured in its extremeposition.

3. In combination with a projection head having a film sprocket, a padroller, means for supporting said roller in variable relation withrespect to said sprocket comprising a pivoted arm, a roller supportsecured to one end of said arm, stop members associated with the otherend of said arm, resilient holdingmeans carried by said armbetween saidstop members. and a stud secured to said projection head and contactingwith said stop members and said holding means whereby the movement ofsaid arm is limited and said arm is frictionally secured in its extremepositions.

4. In combination with a projection head having a film sprocket, a padroller, means for supporting said roller in variable relation withrespect to said sprocket comprising a pivoted arm, a roller supportsecured to one end of said arm, stop members associated with the otherend of said arm, and resilient holding means carried by said arm and astud secured to said projection head and contacting with said stopmembers and said holding means whereby the movement of said arm islimited and said arm is frictionally-secured in its extreme positions.

5. In combination with a pad roller, means for supporting said rollercomprising a pivoted arm, a roller support secured to said arm, stopmembers associated with said arm, holding means carried by said armadjacent said stop members and a stud secured to said projection headand contacting with said s top members and said holding means forlimiting the movement of said arm and hold 7. A pad roller arm havingmeans for sup-v porting a pad roller, and means for limiting themovement of said arm, comprising spaced stop members and an adjustableset screw secured in one of said members and adapted to engage astationary stop to limit the movement of said arm in one direction.

8. A pad roller arm having means at one end thereof for supporting a padroller, and means at the other end thereof for limiting the movement ofsaid arm, comprising bifurcations and an adjustable set screw secured inone of said bifurcations and adapted to engage a stop to limit themovement of said arm in one direction, the other of said bifurcationsbeing adapted to engage said stop to limit the movement of said arm inthe opposite direction, a circular bore in said arm between saidbifurcations, a pin having a rounded surface secured therein, and aspring in said bore for urging said pin outwardly toward said stop.

9. A pad roller arm having means at one end thereof for supporting a padroller, and means at the other end thereof for limiting the movement ofsaid arm, comprising bifurcations and an adjustable set screw secured inone of said bifurcations and adapted to engage a stop to limit themovement of said arm in one direction, the other of said bifurcationsbeing adapted to engage said stop to limit the movement of said arm inthe opposite direction, a circular bore in said arm between saidbifurcations, a pin having a rounded surface secured therein, a springin said bore for urging said pin outwardly toward said stop, said inhaving a slot and a screw carried by said arm and cooperating with saidslot to prevent removal of said pin,

cooperating with said slot to prevent removal of said pin.

11. A pad roller arm having means at one end thereof for supporting apad roller, and means at the other end thereof to engage a stationarystop for limiting the movement of said arm, comprising spaced stopmembers, a circular bore in said arm between said stop members, afriction pin secured therein and means for urging said pin outwardlytoward said stationary stop for locking said arm in itsextremepositions.

In testimony whereof I have hereunto set m hand.

y AUGUSTO DINA.

10. A pad roller arm having means at one end thereof for supporting apad roller, and

.means at the other end thereof to engage a stop for limiting themovement of said arm, comprising spaced stop members, a circular bore insaid arm between said stop members, a pin resiliently secured therein,said pin ham ing a slot and a screw carried by said am

